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Description
RCU principle
The RCU is an outdoor device. The RCU
works in partnership with a set of
Fusesavers to increase network automation
by allowing the utility control center to
remotely monitor and control Fusesavers.
Additionally, the RCU can be equipped with
a control panel to enable local operator
control of the Fusesavers. FS control panel
controls can include tripping and closing
and changing protection mode of the
Fusesavers.
The Siemens FS is equipped with a short-
range radio (range approximately 65.6 ft
(20 m)) to allow configuration and control.
In order to connect the FS into a utility
SCADA system, a RCU is required. For
understanding of the FS operation, refer to
the FS operating instructions
(IC1000-F320-A170-XX-XXXX).
The RCU is a pole-mounted enclosure
containing a microprocessor, a short-range
radio and a long-range radio (or modem).
The long-range radio (or modem) is not
supplied or fitted by Siemens unless
specifically included in the sales contract.
The microprocessor retrieves data from the
FS using the short-range radio and sends it
to the SCADA system using the long-range
radio. Incorporated into the RCU is a power
supply system with a standby battery and
provision for auxiliary power connection or
solar power.
This manual describes in detail the
functions, configuration and maintenance
of the RCU. The intended users of this
manual are the utility SCADA, operations
and maintenance staff.
The design and testing of the RCU is
according to the relevant parts of IEC
60950-1 Ed. 2.2 (2013) Information
technology equipment – Safety ‒ Part 1:
General Requirements.
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Item
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Figure 2: Installation of RCU with Fusesavers
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Description
Conductor
Fusesaver
Communications module
Fuse
RCU
Ground (earth) connection
Auxiliary power connection
Antenna for long-range communications
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